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One leg suddenly swollen, especially with pain, redness, or warmth, may indicate a blood clot.
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Both legs swollen may be related to fluid retention, medications, or heart, kidney, or liver problems.
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Leg swelling with shortness of breath or chest pain requires emergency medical attention.
Swollen legs do not automatically mean you have a serious condition, but persistent or unexplained swelling should be evaluated by a healthcare professional.
Are you asking what causes swollen legs, or are your own legs swollen right now?
